[Discover] Add "Shift + Select" functionality to Discover grid

[jughosta]

• Closes https://github.com/elastic/kibana/issues/192366

Summary

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Checklist

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• [ ] Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• [ ] Documentation was added for features that require explanation or tutorials
• [ ] Unit or functional tests were updated or added to match the most common scenarios
• [ ] Flaky Test Runner was used on any tests changed
• [ ] Any UI touched in this PR is usable by keyboard only (learn more about keyboard accessibility)
• [ ] Any UI touched in this PR does not create any new axe failures (run axe in browser: FF, Chrome)
• [ ] If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the docker list
• [ ] This renders correctly on smaller devices using a responsive layout. (You can test this in your browser)
• [ ] This was checked for cross-browser compatibility

Risk Matrix

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Before closing this PR, invite QA, stakeholders, and other developers to identify risks that should be tested prior to the change/feature release.

When forming the risk matrix, consider some of the following examples and how they may potentially impact the change:

Risk	Probability	Severity	Mitigation/Notes
Multiple Spaces—unexpected behavior in non-default Kibana Space.	Low	High	Integration tests will verify that all features are still supported in non-default Kibana Space and when user switches between spaces.
Multiple nodes—Elasticsearch polling might have race conditions when multiple Kibana nodes are polling for the same tasks.	High	Low	Tasks are idempotent, so executing them multiple times will not result in logical error, but will degrade performance. To test for this case we add plenty of unit tests around this logic and document manual testing procedure.
Code should gracefully handle cases when feature X or plugin Y are disabled.	Medium	High	Unit tests will verify that any feature flag or plugin combination still results in our service operational.
See more potential risk examples

For maintainers

• [ ] This was checked for breaking API changes and was labeled appropriately

[elasticmachine]

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[kibana-ci]

:broken_heart: Build Failed

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• Commit: a3f86a88e6b67e22f251b1cd0d510a42c9b26614
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Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
cloudSecurityPosture	496.7KB	497.2KB	+553.0B
discover	812.9KB	813.4KB	+553.0B
esqlDataGrid	153.0KB	153.5KB	+553.0B
securitySolution	20.4MB	20.4MB	+2.7KB
slo	854.1KB	854.7KB	+553.0B
total			+4.9KB

History

To update your PR or re-run it, just comment with: @elasticmachine merge upstream

cc @jughosta